On Tue, Jul 1, 2014 at 12:33 PM, Daniele Nicolodi <dani...@grinta.net> wrote:
> On 27/06/2014 20:51, Daniele Nicolodi wrote: > > This question is not strictly GNURadio related, but I hope to find > > people more knowledgeable than me here... > > > > I have a signal x(t) at a carrier frequency fc which is phase modulated. > > The phase modulation itself is modulated at a modulation frequency fmod: > > > > x(t) = Eo cos(2 pi fc t + m(t)) > > > > m(t) = Ao cos(2 pi fmod + phi) > > > > I know exactly fmod (it is a coherent modulation/demodulation > > experiment), and I have a good estimate of fc. I need to, extract > > amplitude Ao and phase phi of that modulation. > > > Hello, > > the solution that I found (and that works very well) is to track the > carrier frequency with a digital PLL. With the tracking PLL block in > GNURadio it is easy. GNURadio is fun! :) > > Cheers, > Daniele > Yep, that's a pretty classic way to do it. Glad you figured it out! Tom
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